Github user marmbrus commented on the pull request: https://github.com/apache/spark/pull/790#issuecomment-43245088 Nice. We stopped using this before because it was breaking serialization of Rows (since they are also Seqs). I guess as long as we run it after registering Rows specifically then everything works. @rxin or @pwendell, if this release candidate fails we should put this fix into 1.0.
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